Comparison of sound level meter calibration for frequency weighting parameter using coupler method

Abstract

A large number of industrial needs to the sound level meter (SLM) calibration has encouraged the laboratory to develop a qualified calibration system. As one of the SLM calibration methods required by the standard, the coupler method is considered as the most convenient to be implemented, especially for the secondary laboratory. Therefore, the aim of this work is to compare the SLM calibration for the frequency weighting parameter by this method using the instrument standards that comprise of a multifunction acoustic calibrator and a working standard of pressure microphone (WS2-P Microphone). Moreover, the result of frequency weighting calibration using these standards, therefore, is compared to the reference value required by IEC 61672-1. From the result, the deviation values of these standards are obtained relative to the reference. At the low to middle frequencies, the deviation values are slight relatively, while at the higher frequency, it tends to bigger. In addition, these methods also support the development system of noise dosimeter and sound level meter calibration that still under research through the scheme of Incentive Research Program for the National Innovation System in 2020.

Uji Banding Laboratorium Kalibrasi : Kalibrasi Sound Level Meter dengan Artefak Rion NL-10A

“…Grafik Koreksi Pembobotan (W-A) pada frekuensi 12500 Hz kalibrasi untuk meningkatkan kemampuan sistem kalibrasi yang mumpuni. Sebagai salah satu metode kalibrasi SLM yang dipersyaratkan oleh standar, metode coupler dianggap paling nyaman untuk diterapkan (Dwisetyo et al, 2021), terutama untuk laboratorium sekunder. Laboratorium LIPI menggunakan reciprocity method yang terbilang paling akurat kalibrasi mikrofon yang berhubungan dengan perhitungan ketidakpastian (Hermawanto et al, 2018).…”